Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b2846dd34ea6d0…

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 23:32:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6f8f0ecab105bbef25334ff35059306c SHA-1: 7003854fd1bea02f867e25ba12768c20a1b1eec5 SHA-256: d2b2846dd34ea6d08e3d196627bf627cbac788633c099a891faebe23fb2233d9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as SEO link farms. The document body, though partially corrupted, contains references to 'coinmasterfreespins' and URLs related to game hacks and free spins. The presence of a PDF_URI heuristic and the ML_NYX_PDF_MALICIOUS firing strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/coinmasterfreespins-game-hack
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-spin-link_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/can-you-host-a-minecraft-server-for-free_GM479516143.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/roblox-generator-no-human-verification_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/microsoft-bing-free-robux_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/roblox-studio-free_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-spins-on-coin-masters_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-robux-gift-card-generator_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/minecraft-redeem-code-free_GM479516143.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-robux-hack-no-human-verification_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-do-we-get-free-robux_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/daily-free-spins-coin-master_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-do-you-get-free-roblox_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-rare-cards-for-coin-master_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/coin-master-free-spin-game_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-spin-and-coin-links_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-coins-spins-on-coin-master_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-spins-coin-master-links-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048e8.bin
504a8851b8d6cd8d90d8c844a71c6c2f28bf7eb63b082917a29dbe307de7d912		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E8 28872 bytes
font_01_sfnt_off00008492.bin
48872130680f0d6309128a4b322cbb0730700ec4544966fd5aa3d357de7636d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8492 17980 bytes

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